fis-gtm/sr_port/mm_read.c

38 lines
1.2 KiB
C

/****************************************************************
* *
* Copyright 2001, 2010 Fidelity Information Services, Inc *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "gdsroot.h"
#include "gdsbt.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsfhead.h"
#include "mm_read.h"
#include "gtmimagename.h"
GBLREF sgmnt_addrs *cs_addrs;
GBLREF unsigned char rdfail_detail;
sm_uc_ptr_t mm_read(block_id blk)
{
/* --- extended or dse (dse is able to edit any header fields freely) --- */
assert((cs_addrs->total_blks <= cs_addrs->ti->total_blks) || !IS_MCODE_RUNNING);
assert(blk >= 0);
INCR_GVSTATS_COUNTER(cs_addrs, cs_addrs->nl, n_dsk_read, 1);
if (blk < cs_addrs->total_blks) /* use the private copy of total_blks */
return (cs_addrs->acc_meth.mm.base_addr + (off_t)cs_addrs->hdr->blk_size * blk);
rdfail_detail = (blk < cs_addrs->ti->total_blks) ? cdb_sc_helpedout : cdb_sc_blknumerr;
return (sm_uc_ptr_t)NULL;
}